Door constituting a removable and changeable refrigerating unit for refrigerating plants



Jan. 14, 1936. E. CALATRONI 2,028,046

DOOR CONSTITUTING A REMOVABLE AND CHANGEABLE REFRIGERATING UNI'I FOR REFRIGERATING PLANTS Filed July 25, 1934 2 Sheets-Sheet l .1 Fi a 1 r I: 77 1 rlllllill HH @1; 16

I GNTOK E. CALATRONI Jan. 14, 1936. DOOR CONSTITUTING A REMOVABLE AND CHANGEABLE REFRIGERATING UNIT FOR REFRIGERATING PLANTS v 2 Sheets-Sheet 2 Filed July 25, 1934 mm/w Patented Jan. I 14, 1936 PATENT orr cs noon cons'rrru'rmo A REMOVABLE AND CHANGEABLE nurnrcnaarmo UNIT ron anrmonm'rmo rmn'rs Edison Calatroni, Paris, France Application July 25, 1934, Serial No. 736,951 In France June 27, 1934 6 Claims. (01. 62-116) My invention relates to refrigerating plants or machines and more particularly to refrigerator cabinets and the like andrefrigerating means associated therewith.

Mechanical refrigerators and more particularly those of the household type generally comprise a suitable cabinet and freezing apparatus, the component parts of which are located, depending on their function, either inside or outside said cabinet.

The main object of my invention relates to improvements in such refrigerators.

According to my invention, the complete refrigerating apparatus is very compact and is located between the outside and inside walls of the door or a corresponding part of the cabinet, the various parts being conveniently connected together and placed on a common support, so

I as to permit easy removal and replacement of any part for inspection and repairs and the transformation of suitable cabinets to mechanical refrigerators.

In the accompanying drawings which-show a preferred embodiment of a door according to my invention which is designed for a refrigerating cabinet:

Fig. l is a front view of the door seen from inside the cabinet, the inside wall of the door being removed,

'30 Fig. 2 is a vertical section along the line II-II of Fig. 1,

- Fig. 3 is a vertical section along the line III-III of Fig. 1, l

. Fig. 4 is a horizontal section along the line IV-IV of Fig. 1,

Fig. 5 is an axial section of a compressor shown in Figs. 1 to 4.

Fig. 6 is a section along the line VI of Fig. 5,

Fig. 'l is a front view of the cabinet provided with the door according to my invention.

In the constructional form shown in the drawings, there is secured, on the inner side of door I of a domestic refrigerating cabinet by means of bolts 2, a frame 3 provided with a number of seats 4,5, 6 which are to receive the condensers 1, the compressor 8 and the evaporator 9 respectively. A convenient insulating wall I0 separates the evaporator 9 from other parts.

The compressor 8 comprises as more particu- 60 larly seen in Figs. 5 and 6 an electric motor, the rotor ll of which is provided with a hollow shaft l2 constituting a pump cylinder which accommodates a piston l3 the end of which protrudes out of cylinder 12 and is provided with 55 a cam ll the peripheral edge of which is accoinmodated between abutments l5-IG located on rotor ll.

The piston I3 is provided on its rear partwith pins l'l accommodated in corresponding recesses l8 of the frame IQ of the compressor which prevent said piston from rotating, and which at the same time, constitute an oil pump.

The piston I3 is hollow, its right hand end as shown in Fig. 5 freely enters into the chamber located inside frame 19 and its left hand end 10 is provided with a delivery valve 20. A delivery valve 2| is located at the corresponding end of cylinder l2 which opens into the duct 22 (Figs.

1 and 5) of evaporator 9.

As more particularly. seen in Figs. 1 and 3, l6 evaporator 9 is provided with drawers 23-24 divided into compartments as usual for the formation of ice blocks, said drawers being completely within said evaporator. I

Provided on the lower end of said evaporator 20 is a pipe 25 bringing said evaporator into com-. munication with the coil 26 of condenser I. Said pipe 25 has a conveniently determined and calibrated cross section for controlling the action of the compressor in drawing refrigerant from 25 the evaporator as determined at the time of constructing the apparatus.

As shown in the drawings, the unit comprising all refrigerating parts or elements secured on the door I is covered with a wall 21 conveniently provided with an insulating lining at its inner side. Said wall 21 thus forms together with the door itself a suitably insulated space which is divided in two compartments by means of the insulating partition ill (Fig. 1).

. The compartment 29 (Figs. 1 and 2) which accommodates the compressor 8 communicates with "the external air through openings 30 provided in the door itself.

The second compartment 3| which contains 40 the conveniently insulated evaporator 9 is provided at its upper part with an air inlet 32 and at its lower part with an air outlet 33. Said openings are provided in the upper side 34 and 45 in the lower side 35 respectively of the part of fire door which protrudes into the refrigerating chamber. Due to said openings and to the orientatiOn of same an important circulation of the air contained in the refrigerating chamber takes place round the evaporator 9 thus securing in an eflicient manner the keeping of the atmosphere of said chamber at a low temperature, which results 'in efliciently keeping in good condition substances or foods located in said chamber.

Such a circulation of air is' maintained without the aid of additional baflies.

For effecting a removal of the plant, it is sumcient to remove the bolts which constitute the pins -of hinges 36 of door I then to withdraw interruption in the operation of the refrigerating cabinet. The removed door may afterwards be carried to a shop where the several parts can be conveniently inspected and repaired. The soldered or welded parts may thus be easily separated and soldered again with a. safety which is not easily attained when the refrigerating plant has to be repaired on the spot. It would also be possible in some cases to leave the door in position, the frame 3 with the parts supported by same only being removed by loosening the bolts 2, and substituted by another frame with its parts.

It would of course be possible to obtain reciprocation of piston I3 by providing in the piston l3 a suitably designed groove, and to provide rollers entering said groove, said rollers being journalled on the rotor H.

It would also be possible in some cases, to use as a piston, the core of a solenoid or of an electro magnet.

It is to be noticed that thanks to the described arrangement, the safety of operation is greatly increased for the reason that all connections are 'made in the work shop and have not at all to be undone after the putting in operation of the apparatus. Said connections may thus be made by.soldering or even by welding, thus eliminating any danger of leakage. Also, due to the fact that the compressor does not necessitate any packing any tendency to leak is minimized.

What I claim is:

1. The combination of a removable and interchangeable refrigerator-cabinet door having an outside wall and an inside wall, and a complete refrigerating and cooling plant carried by the door between said walls, said plant being of requisite capacity for food preservation in a corresponding cabinet.

2. The combination of a removable and interchangeable, relatively thin refrigerator-cabinet door having an outer wall and an inner wall, a complete refrigerating and cooling plant with all of its parts arranged between said walls, and a support for all of said parts detachably carried by said door between said walls, whereby they can readily be inserted in the door and removed therefrom, said. plant being of adequate capacity to preserve food in a corresponding cabinet.

3. In a refrigerator including a cabinet, 9. re-

movable and interchangeable door having an outer wall and an inner wall, a complete refrigerating and cooling plant between said walls, such plant being of adequate capacity for the cabinet and including an evaporator, aheat-insulation partition shutting off a compartment including said evaporator, outlet means for the passage of cold air from the evaporator compartment to the interior of the cabinet, and inlet means for the passage of air from the interior of said cabinet into the evaporator compartment.

4. In a refrigerator including a cabinet, a removable and interchangeable door for said cabinet having an outer wall and an inner wall, a complete refrigerating and cooling plant being of adequate capacity for the cabinet and between said walls, such plant including a compressor, a condensor and an evaporator, heat-insulation means setting off a compartment containing said compressor and condenser and excluding said evaporator, and inlet and outlet means for the admission of outside air into said compartment and the discharge of air from said compartment into the outside air.

5. In a refrigerator including a cabinet, a removable and interchangeable door for said cabinet having an outer wall and an inner wall, a complete refrigerating and ice making plant between said walls, such plant including an evaporator, heat insulation means setting off a compartment containing said evaporator, and a freezing compartment projecting into the evaporator compartment and adapted to receive ice containers.

6. In a refrigerator including a cabinet having an opening therein, -a generally fiat closure for said opening, said closure having an outer and an inner wall, and a complete refrigerating and cooling plant supported by said closure between said walls; said plant being of adequate capacity for said cabinet.

EDISON CALATRONI. 

